Fix CVE-2022-25857 (#224) (#225)

Upodate snakeyaml dependency to 1.31

Signed-off-by: andrew-coleman <andrew_coleman@uk.ibm.com>
(cherry picked from commit d1af4a6)

Co-authored-by: Andrew Coleman <andrew_coleman@uk.ibm.com>

pom.xml

@@ -214,7 +214,7 @@
         <dependency>
             <groupId>org.yaml</groupId>
             <artifactId>snakeyaml</artifactId>
-            <version>1.30</version>
+            <version>1.31</version>
         </dependency>
 
         <!-- https://mvnrepository.com/artifact/org.miracl.milagro.amcl/milagro-crypto-java -->